Cogito
Pre-K Math · Chapter 2 · Lesson 4
Zero Means None
A number for nothing at all.
10 problems · about 6 minutes · PK.CC.2
What this lesson teaches
The child understands zero as the count of an empty set.
- Zero means none.
- Zero is a real number and a real answer.
Warm-Up Review
From earlier lessons. Loosen up before the new work.
5 problemsReview — One More: One more than 7?
Answer 8
Why Eight.
Review — Nine and Ten: How many fingers on two hands?
Answer 10
Why Ten.
Review — Six, Seven, Eight: How many? 🐚🐚🐚🐚🐚🐚
Answer 6
Why Six.
Review — Which Has More: Which is more, 5 or 3?
Answer 5
Why Five.
Review — How Many Altogether: You counted to four. How many are there?
Answer 4
Why Four.
Warm Up
Straightforward practice. Get the method working first.
2 problemsNothing on the table. How many?
Answer 0
Why Zero.
An empty plate. How many cakes?
Answer 0
Why None.
Build It Up
The same ideas with more to keep track of.
1 problemOne bird flies away from one bird. How many left?
Answer 0
Why None left.
Stretch Yourself
Mixed problems. Work out what kind of question it is before you start.
2 problemsHow many elephants in your pocket?
Answer 0
Why None!
The Empty Box: The box has nothing in it. How many?
Answer 0
Why Zero.